The IntraSonic RETRO-8AT Vertical Adaptor and Trim Plate kit is for
for 8" Room Stations 11 3/4" x 11 3/4". The Room Adaptor Plate allows
the Intercom Room Station to be installed into the existing rough-in.
The Room Adaptor Plate and Trim Plate are designed to cover larger holes
for older 8 inch room stations to eliminate the need for drywall
repair.